Statistical analysis of Acoustic Emission events generated from a welded joint

Relation between Amplitude and Duration of Acoustic Emission Signals

“…The underlying physical meaning is that the detected AE signal, is the complex consequence of a great number of random independent sources, which individual effects are linked [1]. Moreover, we proved in [1,2] that the sensor produced a linear relation between the incoming mechanical signal and the outgoing electrical signal, being its influence on Duration or Risetime much more complex. In this sense the sensor was modeled by a four-order differential equation in previous work [2,3].…”

“…An extension of the model was developed in this paper to better explain the A-D correlation, continuing published work on modelling AE signals and systems [1,2,[6][7][8][9][10][11].…”

“…In this paper we continue considering that an individual AE signal is a result of the convolution of the input mechanical pulse and the impulse response of the sensor, thought as a linear and time invariant system [1,2]. When a mechanical pulse enters the sensor, the output is a negative exponential.…”